الشيت الأول منى

Question 1

X-linked Anhidrotic Ectodermal dysplasia

Oral manifestations:

Answer 1

• it could associated with hypodontia or anodontia of both dentition.
• Few teeth that are present are retarded in eruption and peg or cone shaped. (remaining teeth are not of normal form they all look like conical shape and small in size).
• Palate is high and cleft palate may be present.
• Salivary gland hypoplasia with xerostomia.
• The alveolar process is deficient in height. • The lips are protrusion.

Question 2

supernumerary teeth:

Etiology:

Answer 2

• Hereditary tendency.

* Multiple impacted supernumerary teeth may be associated with cleidocranial dysostosis and Gardner’s syndrome.

Question 3

• Complications of Supernumerary teeth:

Answer 3

• Causes crowding.
• Causes malposition of the adjacent teeth.
• Cause non-eruption of normal teeth (prevent normal tooth of eruption).
• Unerupted supernumeraries should be extracted as there is a high risk of dentigerous cyst development around the crown of the unerupted tooth.
• Ideal treatment: removal of accessory tooth during the time of early mixed dentition.

Question 4

Cleidocranial dysplasia

• Definition:

Answer 4

• A developmental disease characterized by deficient growth of bones developed in membrane as cranial vault, maxilla, mandible and the clavicles, which are usually underdeveloped or entirely absent.

Question 5

Cleidocranial dysplasia

Oral & Dental clinically Manifestations:

Answer 5

• 1- Delayed shedding of deciduous teeth
• 2-Delayed eruption of permanent teeth
• 3- many unerupted supernumerary or supplemental teeth
• 4- many of unerupted teeth will be seen to have hooked roots.
• 5-many teeth may show different degrees of enamel hypoplasia.
• 6-some teeth will assume a conical shape.
• 7- multiple dentigerous cysts may develop in relation to some of the unerupted teeth. • 8- Gemination may be observed.
• 9-maxilla is narrow and v-shaped wi a high arched palate.
• 10- Absence of cellular cementum is usually found.

Question 6

Taurodontism associated with

Answer 6

Down’s syndrome, klinefelters syndrome and amelogenesis imperfecta.